This is fine:
sage: C = Conic([1,1,-1])
sage: C
Projective Conic Curve over Rational Field defined by x^2 + y^2 - z^2
sage: C.rational_parameterization()
Scheme morphism:
From: Projective Space of dimension 1 over Rational Field
To: Projective Plane Curve over Rational Field defined by x^2
from sage.structure.richcmp import richcmp_by_eq_and_lt,richcmp_method
@richcmp_method
class A(object):
def __init__(self,x):
self._x = x
__richcmp__ = richcmp_by_eq_and_lt("_eq","_lt")
def _eq(self,other):
if type(other)!=type(self):
#other knows how to do
At #24072 I propose to simply disallow elements of positive
characteristic in the symbolic ring (even if pynac has some limited
support for it). It is for me the most reasonable option.
On 21/10/2017 08:35, Ralf Stephan wrote:
Symbolics and finite field elements don't mix. To prevent segfaults
Hi,
Having read the discussion, I would add a big +1 to what Thierry proposes in
https://groups.google.com/d/msg/sage-devel/fE45025Wphs/FheYtjBWAAAJ
So I guess that in terms of vote this means
|X| Yes, we should fully support OpenSSL now, and clarify the licensing
issue.
BUT following Thierry'
Le vendredi 20 octobre 2017 10:49:40 UTC+2, Jeroen Demeyer a écrit :
>
> On 2017-10-19 17:24, William Stein wrote:
> > Good, as well they should. Like you, they likely feel a responsibility
> > to their users to do the right thing regarding security. I really
> > appreciate the "so much tr
Le vendredi 20 octobre 2017 10:51:17 UTC+2, Jeroen Demeyer a écrit :
>
> On 2017-10-19 17:19, Emmanuel Charpentier wrote:
> > Again : R is not only a software package but also an ecosystem.
>
> But why? One could say the same for Python, but you can still install
> Python without OpenSSL.
>
On Sat, Oct 21, 2017 at 12:02 PM, Eric Gourgoulhon
wrote:
> Hi,
>
> Having read the discussion, I would add a big +1 to what Thierry proposes in
> https://groups.google.com/d/msg/sage-devel/fE45025Wphs/FheYtjBWAAAJ
>
> So I guess that in terms of vote this means
>
> |X| Yes, we should fully suppor
Le vendredi 20 octobre 2017 10:58:32 UTC+2, Jeroen Demeyer a écrit :
>
> On 2017-10-19 20:07, Luca De Feo wrote:
> > There you go for something crippled! https://shattered.io/
>
> I don't think that this is actually relevant. This attack would only
> work if an attacker is able to provide a s
>
>
> Very good work :-) not too much time to read today...but I will
enjoy use it and (maybe one day) contribute.
I already have some own draft of short examples for the sagecell ...
...teasing to do or use some kinds of maths I like of course.
Maybe a "process" tutorial (about how to d
Le vendredi 20 octobre 2017 18:27:39 UTC+2, Dima Pasechnik a écrit :
>
> That is what I said a couple of times too.
>
> In particular, IMHO most R users use an IDE called R-studio, so for them
> the Sage's one is not very useful.
>
R Studio tries to kill two birds with one stone :
- rapid
Le vendredi 20 octobre 2017 20:54:37 UTC+2, Jan Groenewald a écrit :
>
>
>
> On 20 October 2017 at 18:27, Dima Pasechnik > wrote:
>
>> That is what I said a couple of times too.
>>
>> In particular, IMHO most R users use an IDE called R-studio, so for them
>> the Sage's one is not very useful.
Le vendredi 20 octobre 2017 17:30:54 UTC+2, Nils Bruin a écrit :
>
> Do we actually get real benefit from packaging R with sage?
>
Good question. It has been discussed before. It boils down to a couple of
factors :
- R has been included in Sage for a long time. We do not know which Sage
That doesn't tell us why Maxima thiks that this is a Cauch principal value.
In fact :
sage: integrate(1/cos(theta)^2,theta)
tan(theta)
which I remind having learned when I was about 15...
Maxima bug ?
--
Emmanuel Charpentier
Le vendredi 20 octobre 2017 08:39:03 UTC+2, Ralf Stephan a écrit :
>
>
On Saturday, October 21, 2017 at 10:34:41 PM UTC+1, Emmanuel Charpentier
wrote:
>
>
>
> Le vendredi 20 octobre 2017 17:30:54 UTC+2, Nils Bruin a écrit :
>>
>> Do we actually get real benefit from packaging R with sage?
>>
>
> Good question. It has been discussed before. It boils down to a couple
On Sat, Oct 21, 2017 at 2:34 PM, Emmanuel Charpentier
wrote:
> The first one *should* easily use a systemwide R. It probably does not
> require the presence of R on a target system to be compiled (but all of this
> has to be checked !).
> The second one would be difficult to maintain, given asynch
On Saturday, October 21, 2017 at 10:52:48 PM UTC+1, Emmanuel Charpentier
wrote:
>
> That doesn't tell us why Maxima thiks that this is a Cauch principal
> value. In fact :
> sage: integrate(1/cos(theta)^2,theta)
> tan(theta)
> which I remind having learned when I was about 15...
>
> Maxima bug
> On 22/10/2017, at 10:53, Dima Pasechnik wrote:
>
> rpy2 is installable using pip (I don't know its requirements); I suppose it's
> maintained well, so the only issue here is of technical kind, pointed out by
> Francois: libR, the R library needed by rpy2, links
> against system blas/lapack
> On 22/10/2017, at 11:08, François Bissey wrote:
>
> People interested should look at the mess that is giac out of the box
> (and in vanilla sage).
Have to take that back, sage doesn’t build giac with lapack enabled, so
you don’t have the double whammy of gslcblas and openblas at the same
tim
On Saturday, October 21, 2017 at 11:08:26 PM UTC+1, François Bissey wrote:
>
>
>
> On 22/10/2017, at 10:53, Dima Pasechnik >
> wrote:
>
> rpy2 is installable using pip (I don't know its requirements); I suppose
> it's maintained well, so the only issue here is of technical kind, pointed
> out
Hi,
On Sat, Oct 21, 2017 at 10:47:54AM +1300, François Bissey wrote:
>
>
> > On 21/10/2017, at 10:37, Michael Orlitzky wrote:
> >
> > On 10/20/2017 11:30 AM, Nils Bruin wrote:
> >> Do we actually get real benefit from packaging R with sage? It seems to
> >> me R is a very popular, very mature
> On 22/10/2017, at 13:27, Thierry wrote:
>
> As of Sage 7.4, doctests pass, but perhaps they are not strong enough to
> show a possible blas/lapack conflict (before your email, i supposed that
> rpy2 just calls R which calls the blas/lapack it is linked to,
> independently of Sage's one, i gue
Every time we have this conversation, the point arises eventually that some
people really do use the Sage-R interface. The packages in R do a lot more
than statistics, and are the easiest place to get many of them (and
similarly in Sage for R users). Then the question becomes how to make sure
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